StandardJS + extra linting inside <template>

• StandardJS-like linting is now applied on all JS code inside <template> (linting was only done on the HTML, not the JS bits)
• Component names must match their file names (vue/match-component-file-name)
• Component names must use PascalCase (vue/component-definition-name-casing and vue/component-name-in-template-casing)
• Components cannot be named after existing HTML or SVG tags (vue/no-reserved-component-names)
• The slot, scope and slot-scope attributes are deprecated since Vue.js 2.6.0+ and linting rules forbid them (vue/no-deprecated-scope-attribute, vue/no-deprecated-slot-attribute, vue/no-deprecated-slot-scope-attribute)
• Use the long form v-slot:default="..." instead of #default="..." to be more explicit (vue/v-slot-style)
• Static style attributes that can be replaced by CSS classes are forbidden—use CSS classes instead (vue/no-static-inline-styles)
• <template>, <script> and <style> must be separated by an empty line (vue/padding-line-between-blocks)
• Function calls without arguments must not use parentheses: v-on:click="something" instead of v-on:click="something()" (vue/v-on-function-call)